what are your top "audio bargins" in your system history?

My Gustard R26. Now that I have owned this for 4 months I would still be pleased if I had paid $6000 for it! $1600 makes me feel like I stole something or am missing something!

as a forever loser - at least in the buying and selling stuff, how about the opposite:

bought new LSA speakers for $1400, and sold them at $500 a few months later - nobody wanted them for a penny more. 

Silverline Boleros. Bought about 10 years ago and have used them exclusively since. Excellent combination of clarity/resolution and musicality. Easy to drive, perfect for tubes. Unfortunately (for others) they are rarely for sale used and a tad expensive new. They replaced a slew of panels/electrostats, and boxes. And, FWIW, they actually look quite nice (for boxes).

Seems like the best stuff I naturally no longer own. 

-SpeakerLab K's- Corner horn kit- built all-in for $450 in 1973

-Oppo BDP93 $17 with remote from Goodwill 2020

-Audible Illusions L Preamp brand new $2,000 2018

But I do still own:

-Fritz Carrera 7BE Speakers $2,200  in 2022

-SolidSteel tables $350 in 2023

-Innuos Zen Mk3 Streamer,Ripper,Storer $2,200 new in 2019.

-Pass Labs INT25 $5,300 3 months old in  2020.

A pair of JBL 4430s (Dollys) in a pawnshop for $450.

Marantz AV7701 for $100. I’m still using it.